Omron SYSDRIVE 3G3JV - Page 64

4-5
Fault
display
Probable cause and remedyFault name and meaning
efj External fault j (EFj)
An external fault has been
input from a multi-function
input.
A multi-function input 1, 2, 3,
or 4 set to 3 or 4 has
operated. The EF number
indicates the number of the
corresponding input (S2 to
S5).
• An external fault was input from a multi-function input.
→ Remove the cause of the external fault.
• The sequence is incorrect.
→ Check and change the external fault input sequence
including the input timing and NO or NC contact.
f00
Digital Operator
transmission fault 1 (F00)
An initial memory fault has
been detected
• The internal circuitry of the Inverter has a fault.
→ Turn the Inverter off and on.
→ Replace the Inverter if the same fault occurs again.
f01
Digital Operator
transmission fault 2 (F01)
A ROM fault has been
detected.
• The internal circuitry of the Inverter has a fault.
→ Turn the Inverter off and on.
→ Replace the Inverter if the same fault occurs again.
f04
Initial memory fault (F04)
An error in the built-in
EEPROM of the Inverter has
been detected.
• The internal circuitry of the Inverter has a fault.
→ Initialize the Inverter with n01 set to 8 or 9 and turn the
Inverter off and on.
→ Replace the Inverter if the same fault occurs again.
f05
Analog-to-digital converter
fault (F05)
An analog-to-digital converter
fault has been detected.
• The internal circuitry of the Inverter has a fault.
→ Turn the Inverter off and on.
→ Replace the Inverter if the same fault occurs again.
f07
Digital Operator fault (F07)
An error in the built-in control
circuit of the Digital Operator
has been detected.
• The internal circuitry of the Digital Operator has a fault.
→ Turn the Digital Operator off and on.
→ Replace the Digital Operator if the same fault occurs
again.
ce
Communications time-over
(CE)
Normal RS-422A/485
communications were not
established within 2 s. The
Inverter will detect this error if
n68 (RS-422A/485
communications time-over
detection selection) is set to 0,
1, or 2.
• A short-circuit, ground fault, or disconnection has occurred
on the communications line.
→ Check and correct the line.
• The termination resistance setting is incorrect.
→ Set the termination resistance of only the Inverter located
at each end of the network to ON.
• Noise influence.
→ Do not wire the communications line along with power
lines in the same conduit.
→ Use the twisted-pair shielded wire for the
communications line, and ground it at the Master.
• Master’s program error.
→ Check and correct the program so that communications
will be performed more than once every 2-s period.
• Communications circuit damage.
→ If the same error is detected as a result of a
self-diagnostic test, change the Inverter.
Maintenance Operations Chapter 4